3 years ago

BRAINIEST & 25 POINTS !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

lisabon 2012 [21]3 years ago

6 0

Answer:

m<R = 65

Step-by-step explanation:

m<R + m<S + m<T = 180° (sum of interior angles in a triangle)

(5x - 11) + (3x - 3) + (3x + 18) = 180°

Solve for x.

5x - 11 + 3x - 3 + 3x + 18 = 180

Add like terms

11x + 4 = 180

11x = 180 - 4

11x = 176

x = 16

m<R = (5x - 11)

Plug in the value of x

m<R = 5(13) - 11

m<R = 65

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*BRAINIEST & 25 POINTS* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

BRAINIEST & 25 POINTS !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!